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How can I pair socks from a pile efficiently?
Yesterday I was pairing the socks from the clean laundry and figured out the way I was doing it is not very efficient. I was doing a naive search — picking one sock and "iterating" the pile in order to find its pair. This requires iterating over n/2 * n/4 = n 2 /8 socks on average.
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Greedy vs. Reluctant vs. Possessive Quantifiers
I found this excellent tutorial on regular expressions and while I intuitively understand what "greedy", "reluctant" and "possessive" quantifiers do, there seems to be a serious hole in my understanding.
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How to install both Python 2.x and Python 3.x in Windows
...ws 7, but now I need to use the Python Imaging Library (PIL), ImageMagick, and wxPython, all of which require Python 2.x.
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How do you split and unsplit a window/view in Eclipse IDE?
...or splitting is:
Azerty keyboard:
Ctrl + _ for split horizontally, and
Ctrl + { for split vertically.
Qwerty US keyboard:
Ctrl + Shift + - (accessing _) for split horizontally, and
Ctrl + Shift + [ (accessing {) for split vertically.
MacOS - Qwerty US keyboard:
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How do I change the root directory of an apache server? [closed]
... /etc/apache2/conf/httpd.conf
Use your favourite editor (I recommend Vim) and look for the DocumentRoot and change it to /users/spencer/projects. Also look a little further down for a setting that looks like this:
<Directory "/var/www">
You will also want to change what is in the quotes to...
Importing a Maven project into Eclipse from Git
How can I get the effect of choosing to import from both Maven and Git and have Eclipse properly generate my project?
13 A...
Why remove unused using directives in C#?
...me.
Static analysis is slower.
Code compilation is slower.
On the other hand, there aren't many reasons to leave them in. I suppose you save yourself the effort of having to delete them. But if you're that lazy, you've got bigger problems!
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When should I use a struct rather than a class in C#?
When should you use struct and not class in C#? My conceptual model is that structs are used in times when the item is merely a collection of value types . A way to logically hold them all together into a cohesive whole.
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What's the difference between using “let” and “var”?
...let keyword was introduced to the language was function scope is confusing and was one of the main sources of bugs in JavaScript.
Take a look at this example from another stackoverflow question:
var funcs = [];
// let's create 3 functions
for (var i = 0; i < 3; i++) {
// and store them in fun...
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
I make an outer join and executed successfully in the informix database but I get the following exception in my code:
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